Pump



April 1, 1930. F. G. BROWN 1,752,366

PUMP

Filed June 18, 1928 v /1 ..5 sun ,am 1li Patented Apr. 1, 1930 UNITED STATES PATENT OFFICE lm G. BROWN, l' DETROIT, MICHIGAN appumion'med me 1s, 192s. semi 1ro. asomo.

The present invention pertains to a novel an impeller or rotor 13 having a hub 14 conpump designed particularly for drainage purposes but also ca able of service for the general purposes o elevating water and other l lhlids. 4

n pumps of this character which are usuall placed in sumps, cesspools, furnace pits, e evator shaft pits and the like, there has been considerable diiiculty in keeping the liquid awa from the bearing at t e ower end of the s aft. The principal object of this invention is to provide a satisfactory gland that will effectively prevent access of water to the bearing and u r parts of the assembly. In the accomp ishment-of this object,

the device is so constructed that a compressible packing between the shaft and the rotor constitutes a seal between the water chamber and the bearing. The impeller or rotor is normall loose on the shaft, and a cam connection tween the shaft and the impeller compresses the packin until the im ller can no longer be displace after whic the impeller turns with the shaft. The invention is fully disclosed by way of example in the following description and in the accompanying drawing, in which- Figure 1 is an elevation of the device partly in section; Fig. 2 is a plan sectional view; and

Fig. 3 is a detail perspective view inverted. Referencey to vthese views will now be made by use of like characters which are employed to designate corresponding parts throughout.

The assembl is built u on a base 1 having a series of egs 2 and t ereby adapted to be sitioned in or near the sump or other region to be drained. Upon the base is mounted a pump casing comprising a lower 4 section 3 havinlg downwardly extending lugs 4 secured to t e base by screws 5, and an upper section 6 fixed to the lower section by bolts 7. The upper section has an upwardly extendin boss 8 into which is threaded the lower en of a shaft tubing 9. On the u er end of the tubing is mounted a suitab e housing 10 containing an electric motor 11. A shaft 12 extends from thelano'tor axially through the tubing and into thecenter of the 5 pump casing. Within the casing is disposed centric with the shaft and considerablyl The lower part of t er than the same.

large hub is restricted at land closely surrounds the same but is loose with respect thereto. In the bottom of the hub is placed a quantity of com ressible material 16 and this is enaged y a boss 17 extendin downwardly om the upper section 6 into t e hub 14. In the top of the section 6 is a central recess 18 containing adouble race ball bearing 19 for the lower end of the shaft 12. i J The restricted part of the hub is extended downwardly and outwardly of the im eller and is clined given the form of twov` opposite y inaces 2O as shown more clearly in the ment to the impeller.

t will thus be seen that the packing material being compressed as closely as possible effectively prevents access of water to the bearing Although a specific embodiment of the invention has been illustratedand described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

What I claim is 1. In combination,

a rotary shaft, a rotor loosely mounted thereon, a compressilb packing surrounding said shaft at said rotor,

and a cam connection between said shaft and rotor adapted to shift the latter on rotation of the shaftand thereby compress the packing.

2. In combination,

loosely mounted thereon, a compressible a rotary shaft, a ro`tor packing surrounding said shaft at said rotor, a cam formed on said rotor around the outer end thereof, an'd in engagement wi a in carried by said shaft cam and adapted ing.

to lift the rotor whereby to compress the pack- 3. In combination a rotary shaft, a rotor having a hub receiving said shaft, said hub having a restricted portion loosely surrounding the shaft, a casmg enclosin said rotor, a. oss extending from said casing into the hub and surrounding the shaft, a compressible packing between said restricted portion and said hub, and a' cam connection between said shaft and rotor adapted to. shift the latter on rotation of the shaft and thereby compress the packing.4

4. In combination, a rotary shaft, a rotor having a hub receiving said shaft, said hub having a restricted ortion loosely surroundin the shaft, a casing enclosing said rotor, a oss extending from said casing into the hub and surrounding the shaft, a compressible packing between said restricted ortion and said hub, a cam formed on sai rotor around the outer end thereof, and a pin carried by said shaft in engagement with said cam and adapted to lift the rotor whereby to compress the ac king.

5. In combination, a rotory shaft, a rotor loosely mounted thereon, a compressible packing surrounding said shaft at said rotor, oppositely inclined members formed on said rotor about the center thereof, and a pin carried by said shaft in engagement with said members and adapted to lift the rotor whereby to compress saidpacking.

6. In combination, a rotary shaft, a rotor having a hub receiving said shaft, said hub having a restricted ortion loosely surroundin the shaft, a casmg enclosing said rotor, a oss extending from said casing into the hub and surrounding the shaft, a compressible packing between said restricted portion and said hub, oppositely inclined members formed on said rotor about the center thereof, and a pin carried by said shaft in engagement with said members and adapted to lift the rotor whereby to compress said packing.

7. In combination, a pump casing, a rotary shaft extending therein, a rotor loosely mounted thereon, a compressible packing surroundingsaid shaft at saidrotor,l a cam connection between said shaft and rotor ada ted to shift the latter on rotation of the sha and thereby compress the packing, and a bearing between said shaft and casing above said packing..

In testimony whereof I aix my si ature.

. FRANK G. BR WN. 

